Headphone



FIG. 1 is a front, bottom and right-side perspective view of a headphone showing our new design;

FIG. 2 is a rear, bottom and left-side perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right-side elevational view thereof; and,

FIG. 8 is a left-side elevational view thereof.

The broken lines of the drawings represent portions of the headphone that are not part of the claimed design. 

CLAIM The ornamental design for a headphone, as shown and described. 